Considering a change. Avantgarde for Wilson.

Most definately: Get some curtains up in front of those windows. Standing waves are a killer, wreaking havoc on everything you are trying to achieve with your high-end system.

I can chime in on the merits of the Omega upgrade - money well spent, considering your already substantial investment - but would address room issues first. I too use Lamm amps and am very satisfied.

Once again, treat your room, get curtains for all that glass, some asc tube traps for the corners,some half traps at the first reflection points, some room tune corner traps at the ceiling, Then walk around the room and clap you hands, wherever you can hear a slap echo, treat that area at the ceiling. You have invested so much money in your system it is a shame not to be able to hear it perform at its best.Once your room is properly treated you will not believe the difference, only then would I consider the omega upgrade and only if you have the itch to upgrade.
Mike

Good that you made a decision.

I've had both and now own the W/P 8's. Why, because they make better music in my home environment with my system. Truly, its always comes down to that - a combination of factors in your home environment and your system components. In the future at your price range, always do a home trial if you are considering a change,

enjoy the music

Room treatment is definitely a big need, yes, indeed.
Thanks all. Home decoration is most intrusive and
problematic of all for us but important acoustically.
Give me a beautiful speaker. Okay. But where do I need
that sound-panel? Not in my living room, she says.
Will work on it.